Hydraulic gate and check valve



Oct. 2, 1928.

W. B. ANDERSSON HYDRAULIC GATE AND CHECK VALVE Filed March 14, 1927 2 Sheets-Sheet /w 7 42-5? I l l I l l l I I l I l l l BY QZZWQKVM Patented Oct. 2, 192 8.

Lessee;

wewee ewe-me QF QHI'CAGQIII'LINOE- I nymummc Gem AND CHECK VALVE.-

erplicatipn tied 1in h 1 92, Se ial. N ?36- 7 e In waterwo ks in wh ch :viiziteiis pumped y centrifugal .pwnpe, t iside mb e to. hav a check valve in ac'lditiom to the regular gate vzilvein larder to plem z t any neti r i r'back fio wofthe Water in fiheevent of theEeccideg tzil stepping ofthepump 917 if the pump {Edi-ls to 1 maintain'the necessajiy pressure themains,

Such check valveshawcheen found gh jectiepeble fqrvarioiis reejscns and a e-84S! wry? pensive if made isufficiently li -IgQ 9 large Water mains, such asuscd in the Wet- WO Q (wilt-he la-rgerlcitiesl. J i j 1 The present invention 126131565130 walses pertieularly adapted Vfo pius e in Wetenmains and automatic'means for ccntrolling such valves in theevent of the accidentafl-stapp ng h pum or reduction (if QIZBSSUILGQYI'BdHCBQ rate of: flow of the weterin the main.

' The objecte f this inventibn m .to provide an -i-mprpved. acppamt'us for 11se11-11 connection with Water systems; to provide a pipe closure and means for actuating the closure under certein predetermined conditions; to pmvide a ve'l-ve for the outlet :pipe of a pump and means whereby the valve-may be manually 0r autoiiiwtially actuated; t6: V'provide a vzilve for a water-main with a piston and cylinder for actuatihg thesame anti means fcircontroliing the' fiowof fluid fro'm'the mailnt'o the cylinder; end to provide such other novel features in construction and improvements in operat- 'ing iiiechaiiism as williappe er ma ze telly from V v the following description-takenin.conne which,

Figured isplan View with parts bljqken mm, with the accompanying clriawings; in

away toshow the.interidlfconstruction; V-

Figlil'eQ 1s aneniarged secfii'o iel detail of one of the centrollimg :vaflyes' Figune 3 is a. sectien m mio'n the line 3.1 s

cfFiguterfzg, e V. r

F'gure is an enlarged detail-0f mber va lve audits oter atitig mechanism; I

'Fi fire 5 's a side yiew craziew 5mm the'left 'ha ld'side of Figure '1 with parts broken away-Or shown dizigra-= atica lly for 0011- veni'en ce iniilpstnetiom/ a L c Figure .6 1s an enlargle sectional detail of apothervelye; q 1 Flgure 7 is'a 89013101131 VIEW taken on the *Figure 8 is a seetienal detailpf another valve.

' "Tithe penticuler' fo rmcfihe apparatus s iilimstpated in" these: drawings; 1.0 represents jpi epr Ip'ain for conducting ?fii 1id,,s 1ch as the pf a, meter, orks eystems or eutlet pipeq 'p i' Th e H es pi' vi w h y 'g; velve 11 which may be of my suitable fer closing the maid vrlo t which 01 0011:.

tentacl -is il u ra d si i W t-e whi h .closedhy a gete 12. The'valve 11 actuated mea s of a cyh decahd ,piton which my :bg e em l' ,ce nect d' t e ewith e e? d el e man e s Shawn he; a e 1- va e 2 #3 c nnec ed byeed W te piste '14 ein suppo t d ii ininc iv n n m eee' as hy en ctin m nes r ed h emb e lT- st ed- A p p lfi le ds immth m n I 170 10a fouray valve 17 having one cqnneev V.

t sm 18110 Qn n f t ecy-lind r id an her connectionlQ t0 the eppqsi teerid efthe cylind n and an ou l ipe 20. wh h ee ht e atmosphe e- T Pi Q is anua ly 01 1- iol e brown g-e 'c bs ne th a n. v l e by tutni-ngthe valve 17'.- When this zaive tu ne e @0116 p si i n, the; Wate i'fluid rQm t e wi pass h u h the lip? 11 1 P pe 8 ne-end of, hecvl den th -7 1 b? r ing. h P S 0I QW ;-f0 inste e a shown in Fianc A $1 c tim 'th va ve 17 Prov d ae il n ng fl i' t QP-iPQ 1'1 thrOll-Qh the/pipe -20 to thezz trheephene qr iag y suitab e d ain s t a t er 1: 0 p ee iir :Qi

the opp t c f: he p st n- W e th Ina-in valve is t be Opened, t e t m-Wei lve 1? i tur d-s tha h ii erw e s from y 4 e pip l i 12 12 1 th pipe 19 t -.th a ppbs tfi en of th y in e n t i ut r'endw le finch time be oven e m spheneapparatus for effecting the automatic clqeing point below r on-the -,.-d'o ;vn streatd side of in ,thefhe'ad oi -the cylinder 15; shbwnin F ure-1., e a ra gement being u h hat this valve, con r l the fl f W ter t u h the pipe 21 .to the outer end ofthe cylinder. This valve is preferablycf the P18120111 type '91 the ma val e is cqnnect d wi h t e I -in, 1 and thecy'linder, and is controlled by the flew \Qlf ppessurein the'main;

the. alve 11. :tIQ an inl t con r val e 2 y.

ranrlcomprises a1 cylindrical b odyjhzwing an v annular inlet fopeningfi?) which is connected I i directly With-the pipe2l. A sle'eveQis ari:

I r d in he v lve bo y an has n mb r. -0Efs10ts'25' to permit thewater to; passjf rop n the inlet 23 int) the .ValVQ' 1 p to the outlet. j V

The valve is epenedandclosedby a, piston via-{ ve member 26 wh chi a ap e mqv f ud n lly in the sleeve 24,. suc l -VB A P p 21 sle' ds fr m hep pie LQ 7 i with the slots 'therethrough beingprovided water. V p

and adjusting 'nut-30which are adapted to stroke. I preferto adjust these parts engage with the gland or valve member 26 to close the valve 22 whenthe piston 14 approaches the end of its inward or closing so that the valve 22 will be closed when the piston 14 5 is about two inchesfrom the end ofthe stroke 'inorder to prevent undue strain or pounding on the'main valve 11 as it is closed. If the piston is stopped shortly before the main valvell is closed, such main valve may then be closed manually if desired, or by providing a small hole 67 in the piston 26, the water will gradually close the valve. The valve 22 is openedand also urged toward open position by the pressure in the cylinder and is also acted on by the rod 27, as the friction ofthe rod passing through thegland will ordinarily I be sufiicient to move the piston valve member 'provide a" Wl'llCh is-a 26" outwardly until it is stopped by the annular projection or ring 31,'as shownin Figure '2. However, in the event'of the'failure of the friction being sufficient-to open the'v'alve, I ipe or sleeve 32 on the rod; 27 aptedto engage withjthe piston valve 26and move it to open position when the piston 14 moves outwardly;

The flow through the'pipe' 21 is further controlledby' a valve 33, preferably of the balanced type having'arod 34 which is adapted tobeac-tuatedfby a piston 35 at one end and a larger piston 36 at the opposite end. These pistons operate respectively'in cylinders 37 and 38, forming a part of the valve body. The outer 'end of the cylinder37 is connected by a pipe 39 with a nozzle 40 which is positioned n thepipe 10 with its open enddire'c'teddown stream or away from the pump,- as shown in 'Figure 1. Y The outer end of the cylinder-38' is connected by a pipe 41 with a nozzle 42 in the pipe 10,whic h nozzle is directed up stream or toward the pump and'positioned on the up-stre'am side of the main valve 11.

:The'cylinder 15 is preferably provided with two outlet or exhaust pipes 43 and44 which lead to a valve'45, preferably of the balanced type and having an outlet 46 lead-- ing to the atmosphere or to a drain.

The valve stem 47 has a piston 48 at one end and a larger piston 49 .at the opposite end, these P t COaOtiHg respectively with cylinders and'5'1. The outer end of the cylinder 50 s connectedjby a pipe 52 with the pipe 39.,

'The outer end of the cylinder 51 is connected by a pipe or connection 58 with the A pipe 54 leads from the pipe 41 to a valve 55"Which is preferably of the balanced type and which is provided with an outlet pipe 56 -which may lead to the inlet of the pump or to the atmosphere. 'If it leads to the atmos-,

phere, it isprovided with a check valve 57 to prevent air from returning therethrough'. The valve stem 58 of thevalve 55 is connected at one end with a diaphragm59in a'dia phragm chamber 60 and is connected atv the other end with a diaphragm 61in a-diaphragm chamber 62. The outer portion of the diaphragm chamber601is connected by a pipe 63 with a nozzle-64, which ispoi-nted down stream and positioned on the downstream side 0t the'main valve, as shown 1m Figure 1. The outer portioniof the chamber 62 is connected by a pipe 65 with a nozzle 66 in the pipe 10 on theup-stream side of the valve 11 and having'it-s openend directed up stream or toward the pump. The various nozzles in the pipe 10 are positioned with respect tot-he inner periphery of the pipe so that they will have the; proper controlling effect and are preferably arranged on theside adjacent to the portion of the gate 12 which opens first so that they'will have the full eifectof the flow as soon as the'valve starts to. open.

When the pump is. running and the main valve 11 is open, the piston '14 will beat the outer end of the cy1i'nder15 and the valve 22 willalso'be open. a Atthis time the four-way .valve'17 may be set in neutral'position ;so that no fluid is admittedto either end of the cylinder or may be set-to'connect the inner end of the cylinderfwith themainor supply'lin'e 10, and to open the outer end ofthecylinder to the drain; 1 The valve 55 is held closed by the difierence in pressure in the'line's 'or pipes 65and 63. This valve is preferably smallfas for instance three-fourths of an inch or'less and the availablev difference in pressuresacting through the relatively large diaphraigms is suflicient to hold the :valve tightly closed.

Atth'is'time the pipe 54 is closed tothe atmos- 3 phere and the pressure in the pipes 41 and 53 acting through thepistons 36 and 49 will'hold the respective valves 33 and 45 closed.

' If the valve 'for the mainor supplyipipe 10-is being closed by the manual control valve 17, the valves 33,- 45 and 55 remain closed as the pump Will still be running," but when the main valve is completely closed and thepump is stopped, these valves will openbut the valve 22 is thenclosed and the valve 45 in the dis charging line is preferably. so located that it will not drain the cylinder and' consequently there is no flow through the valve.

W hen'the pump is started, there will be a flow through the pipes 41 and 54, through the valve 55 to the atmosphere or to the pump suction, but as the pressure is gradually built up in the'pipe'tt the valvet's'will be closed,

thereby cutting'ofi this outlet. Then as the pressure in the pipes 41 and 53 increases,the

pressure on the relatively large pistons 36' and 49 will close the valves 3 3511161 45; The main valve ,117 may then be opened by thev anua were Openin d a a h nw ath rman-defi sa e h s the main valve 11 win be'open the valves 33, and he'closed; If an accident that the pressure in the pipe 63 will open the valve 55, which releases the pressure in the pipes 54 and 41. The valves 33 and 45 are then opened and water is admitted to the outer end of the cylinder 15 and drained out at the inner end, and the piston14 moves inwardly and closes the main valve. The valve 22 is preferably arranged so that it is held open until the piston is about four inches from the end of the stroke, when it will be closed, thereby closing the supply line to the cylinder when the piston is about two inches from the end of the stroke. If the valve 11 is an ordinary gate valve, it will, in most cases, travel a short distance further, due to the inertia of the moving parts andas above described, the valve will be stopped slightly before it is entirely closed.

With this arrangement, the small valve 55, which may be readily actuated and which, may be held securely in closed position by a relatively small amount of power or pressure, serves to control or cooperates with the larger valves 33 and 45 so that the pistons for each of these valves may be of different sizes in order to give the necessary seat pressure to hold the valve tight; This, therefore, provides a series of pressure-responsive devices which operate successively in order to, perform the proper closing of the closure in the water main.

By means of my improved apparatus, it will be seen that I provide a valve mechanism and controlling means whereby a single'valve may, if desired, be utilized both as an ordinary shut-ofi valve and as a check to prevent backflow through the pipes. It will also be noted that different instrumentalities may be utilized for actuating the several valves,

the pistons and diaphragmsbeing illustrative of the best or well known means for this purpose, and other changes may be made in the details of construction or arrangement of the parts to adapt the controlling mechanism to difl'erent types of valves in the main line or to different conditions, and therefore I do not Wish to be limited to the exact arrangement herein shown and described, except as specified in the following claims, in which I claim: I

nozzles (tonnes-ted with the pipesand pesitioned at diflerent peintsin main, asand fer-the purpose aeseribed, J

2. The combination with a water main, of a valve, a cylinder and piston for actuating said valve, a pipe leading from the down-stream side of thevalve to the outer end ofthecylinder, a valve for controlling the flow from said pipe to the cylinder, means actuated by the. piston for opening and closing said valve, a second valve for saidpipe, differential actuating means for opening and closing said valve, a pipe leading from the opening means to the water main, a nozzle on said pipe, directed downstream, and positioned on the downstream side of the main valve, an outlet pipe for the cylinder, a valve for said pipe, difierential means for opening and closing said valve, a pipe leading from the opening, means connected with the pipe from said last named on the up-stream side of themain valve, pipes leading from said nozzle to the closing'means of the last named valves, an outletpipe fro-m the last named pipe, a valve for said outlet pipe, opening means and closing means for said last named valve, a nozzle in the downstream side of the main, a pipe from said nozzle to'the opening means of said last named valve, a nozzle directed up stream in the main on the up-stream side of the main valve, and a a pipe leading from said nozzle to the closing means of the last named valve. V

3, An apparatus of the character set forth,

comprising a w'ater'main, a valve for said opening means, a nozzle directed up stream valve for the cylinder, pressure-responsive means for opening and closing said last named valves, connections between saidmeanS and the main line for supplying pressure under redetermined conditions, an outlet connect: ed with the closing means for said last namedvalves, a valve in said outlet, pressure-responsive means for opening and closing said valve, and connections from said pressure-responsive means to the main line for actuating the last named valve under predetermined condi I tions.

\ 4. An actuating device ofthe character set forth having inlet and outlet valves adapted to be opened and closed by pressure-respon sive means, said means being connected to and receiving their pressurefrom the main conduit, a relatively small; valve, means for con.- necting the'valve with the main conduit for actuating the same by difi'erential pressure at two points inthe main conduit, said last named valve serving to release the pressure in the closing meansof the first named valves under predetermined conditions.

5. The comb'nationwith a water main, of 9.

pressure-responsive device for openingand closing the main, pressure-responsive devlces for controlling the inlet and outlet of the first named device,.all of said devices receiving their pressure fluid from the Water main, Q

means ofthe pressure responsive devices for controlling said inlet and outlet, substantially as describedg v v a a WALTER B AN DERSSON. 

